Photos: Thousands Come Out to Celebrate Martin Luther King

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A Moving Speech

Thousands of people gathered Sunday at Washington D.C.'s National Mall for the official dedication of the Martin Luther King Jr. Memorial.

In a moving speech, President Obama saluted King as a man who "stirred our conscience" and made the U.S. "more perfect." He also rejoiced in the memorializing of the slain civil rights leader's life and work.